Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Midpoint Circle Generation Algorithm
Just as a line drawing algorithm approximates infinite number of points on a line segment by only a finite number of pixels, a circle drawing algorithm approximates continuous circle by appropriately choosing a discrete set of points close to the circular arc. One of the well known algorithms for circle generation is midpoint circle generation algorithm. The algorithm is a variant of Bresenham's line generation algorithm and uses a decision parameter to find out the closest pixel with the actual circle at each incremental step. Implicit equation of the circle given by
(x - xc)2 + (y-yc)2 = r2
is used to define the decision parameter. Here r is the radius and (xc,yc) is the centre of the circle. Symmetry of the circle is fully exploited for its scan conversion. Actually, we need to approximate the circle only in one octant, points in other seven octants similarly get approximated due to symmetry, as shown in Figure on the next page. The decision parameter helps in deciding which pixels are closest to the circle boundary. The algorithm is iterative in nature. Next pixel position and decision parameter are computed iteratively. Just as in Bresenham line drawing algorithm, one only needs to check the sign of the decision parameter to find out next pixel position. This makes the implementation of the algorithm very easy.
1. Use the outline method to plot the following font boundaries (style should remain the same). Implement your method in C language. ANswer: Here letter G is produced
Assume here are three polygon surfaces P,Q, R along with vertices specified by as: P: P1(1,1,1), P2(4,5,2), P3(5,2,5) And as Q: Q1(2,2,0.5), Q2(3,3,1.75), Q3(6,1,0.5) R: R1(0.5,
#BLA for slope greater and equal to 1
View Volumes and General Projection Transformations You have to remember that the view volume is the volume which sets up near and far extents, top and bottom extents and left
Functioning of hardcopy devices and Output primitives 1. Functioning of hardcopy devices-laser printers and dot matrix printers, plotters. 2. Output primitives: Graphics
what is Transformation ?
(a) Differentiate between the following compression algorithm: 1. Shannon -Fano Algorithm and 2. Huffman Encoding (b) A statistical encoding algorithm is being considered
Define Computer graphics. Computer graphics remains one of the most popular and rapidly growing computer fields. Computer graphics may be explained as a pictorial representati
Advantages of Scan line Algorithm: This time and always we are working along with one-dimensional array as: x[0...x_max] for color not a 2D-array like in Z-buffer algorithm.
Background Texturing is like wallpapering; you are pasting an image onto the OpenGL Quad primitive. Recall that GL_QUAD is specified by four vertices. An image, or a texture,
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd